아파치 1.3.37 과 iis6.0의 성능차이?

CentOS4.4에 Apache 1.3.37 입니다.

Server Software:        Apache/1.3.37
Server Hostname:        192.168.0.29
Server Port:            80

Document Path:          /default.htm
Document Length:        15 bytes

Concurrency Level:      50
Time taken for tests:   1.366 seconds
Complete requests:      1500
Failed requests:        0
Broken pipe errors:     0
Total transferred:      387000 bytes
HTML transferred:       22500 bytes
Requests per second:    1098.10 [#/sec] (mean)
Time per request:       45.53 [ms] (mean)
Time per request:       0.91 [ms] (mean, across all concurrent requests)
Transfer rate:          283.31 [Kbytes/sec] received

Connnection Times (ms)
              min  mean[+/-sd] median   max
Connect:        1    10    5.3     10    27
Processing:    36    33   10.1     30    67
Waiting:       19    33   10.1     30    66
Total:         36    43    7.3     40    85

Percentage of the requests served within a certain time (ms)
  50%     40
  66%     41
  75%     42
  80%     44
  90%     58
  95%     60
  98%     64
  99%     66
 100%     85 (last request)

Window2003에 iis6.0 입니다.

Server Software:        Microsoft-IIS/6.0                                 
Server Hostname:        192.168.0.30
Server Port:            80

Document Path:          /default.htm
Document Length:        15 bytes

Concurrency Level:      50
Time taken for tests:   0.496 seconds
Complete requests:      1500
Failed requests:        0
Broken pipe errors:     0
Total transferred:      391867 bytes
HTML transferred:       22695 bytes
Requests per second:    3024.19 [#/sec] (mean)
Time per request:       16.53 [ms] (mean)
Time per request:       0.33 [ms] (mean, across all concurrent requests)
Transfer rate:          790.05 [Kbytes/sec] received

Connnection Times (ms)
              min  mean[+/-sd] median   max
Connect:        1     5    1.7      5    12
Processing:     7    10    2.6     10    25
Waiting:        4    10    2.6      9    24
Total:          7    16    3.6     15    35

Percentage of the requests served within a certain time (ms)
  50%     15
  66%     17
  75%     17
  80%     18
  90%     20
  95%     22
  98%     25
  99%     32
 100%     35 (last request)

위에 두서버는 100%똑같은 하드웨어로 구성돼어있습니다. 둘다 vmware에 같은 옵션을

주고 설치했기 때문에

아파치 설정부분은 수정부분만

Timeout 300
MaxKeepAliveRequests 10000
KeepAliveTimeout 30
MinSpareServers 20
MaxSpareServers 40
StartServers 10
MaxClients 1024

httpd.conf에서 수정부분만 표시했습니다.

IIS는 수정한거 없구요

문제는 성능차인데 약3배가까이 차이나는데 왜그런가요

답답한 마음의 초짜가 물어봅니다.

고수님들의 시원한 답변기다리겠습니다.